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- Feb 2, 2017
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I thought I'd post things as I learn them on the Graziano 12S. This topic is on the headstock lubrication system. It took me a long time looking through the manual, brochure, and web posts to figure it out so thought I'd share.
From all the research I've done, oil flow in the headstock is critical to the performance and longevity of the spindle and headstock gears. There are several posts and even warnings in the nearly illegible manual about the importance of motor phasing so the oil pump spins in the correct direction. As I result I've been pretty paranoid about not messing something up with these critical parts.
The 12S headstock contains the back-gear, lead-screw/carriage drive rotation direction, and thread selection. These gears and bearings are lubricated with ISO 46 hydraulic fluid, recirculated by a mechanical pump driven from the main drive shaft from the transmission. From the pump, the oil travels in a copper tube to the headstock control panel, where it flows through a brass filter element, then into a sight glass with a plastic turbine wheel. From the sight glass the oil flows to a manifold for distribution to the critical areas.
The photo below shows the headstock with the cover removed. The oil pump is highlighted with the light blue arrow. The filter and flow indicator is highlighted with the green arrow, and the manifold has the dark blue arrow.
From all the research I've done, oil flow in the headstock is critical to the performance and longevity of the spindle and headstock gears. There are several posts and even warnings in the nearly illegible manual about the importance of motor phasing so the oil pump spins in the correct direction. As I result I've been pretty paranoid about not messing something up with these critical parts.
The 12S headstock contains the back-gear, lead-screw/carriage drive rotation direction, and thread selection. These gears and bearings are lubricated with ISO 46 hydraulic fluid, recirculated by a mechanical pump driven from the main drive shaft from the transmission. From the pump, the oil travels in a copper tube to the headstock control panel, where it flows through a brass filter element, then into a sight glass with a plastic turbine wheel. From the sight glass the oil flows to a manifold for distribution to the critical areas.
The photo below shows the headstock with the cover removed. The oil pump is highlighted with the light blue arrow. The filter and flow indicator is highlighted with the green arrow, and the manifold has the dark blue arrow.